21–40 of 399 results
Gamma-ray burst illustration

Stellar Science

Astronomers See Extreme Photons from Collapsing Massive Stars

Astronomers have detected a long-sought signal from gamma-ray bursts — the highest-energy photons ever seen from these events.

Global map of Titan's geological features

Solar System

First Global Geological Map of Saturn’s Moon Titan Released

Working with data from NASA’s Cassini mission, scientists have produced the first global map of Titan’s geological features.

microlensing diagram


Observations Confirm Lensing Planet Discovered by Amateur

Follow-up observations of an amateur-discovered exoplanet show that the planet orbits its star at the snow line, where ice giants may form.

Makani Galaxy


Astronomers Image Winds from Faraway Galaxy

Astronomers have directly observed a supernova-driven wind as it's rushing out of a galaxy and far into intergalactic space.

Illustration showing position of Voyager 1 and Voyager 2

Solar System

Interstellar Space: The View from Voyager 2

Voyager 2 crossed into interstellar space a year ago. Now, five teams of astronomers have analyzed the data it returned to paint a picture of the outer boundary of the solar system.

DESI First Light

Professional Telescopes

Dark Energy Survey Sees First Light

The Dark Energy Spectroscopic Instrument is poised to record millions of galaxies as far back as 11 billion years ago to unveil the nature of dark energy.

Large Magellanic Cloud in X-rays

Spacecraft and Space Missions

First Light for German X-ray Telescope EROSITA

The EROSITA X-ray telescope aboard the German-Russian Spektr-RG satellite has taken its first images of the hot universe.

Saturn's new moons

Solar System

Help Name Saturn’s 20 Newfound Moons

Astronomers have found 20 new moons circling Saturn — now you can help name them!

Astronomy and Society

Nobel Prize Honors Exoplanets, Big Bang Discoveries

The 2019 Nobel Prize in Physics goes to James Peebles and to Michel Mayor and Didier Queloz. The prize, which will be split in half, honors discoveries that have offered new perspectives on our place in the universe.

Cosmic web filaments


Best Image Yet of the Cosmic Web

Using the light cast by galaxies bursting with new stars, astronomers have mapped out a piece of the cosmic web 12 billion light-years from Earth.

Fast radio burst as probe of a galaxy halo


Exotic Messenger Probes a Galaxy’s Outer Reaches

Astronomers made use of a fast radio burst, a 40-microsecond flash at radio wavelengths, to evaluate the state of the nearly undetectable gas around an intervening galaxy.

tidal disruption event

Black Holes

Exoplanet Hunter Sees a Black Hole-Shredded Star

NASA's TESS exoplanet-hunting satellite has provided astronomers with a front-row seat as a black hole shreds a close-venturing star.

Loki Patera

Solar System

When Will This Trickster Volcano Erupt?

Loki, a faraway volcanic feature on Jupiter’s moon Io, is acting up and planetary scientists want to know why.


Milestone: Astronomers Discover Water Vapor on a Super-Earth

Two independent teams of astronomers have discovered the signature of water vapor in the atmosphere of super-Earth K2-18b.

Edge-on view of the

Milky Way

Untangling Stellar Strings in the Milky Way

Long-lived, string-shaped groups of stars align with the Milky Way’s spiral arms — and they may provide clues to what those arms looked like long ago.

Supernova (artist's concept)

Stellar Science

The Supernova That Destroyed Its Star

Astronomers have discovered a real and unprecedented example of a type of supernova that was until now largely theoretical — a stellar explosion that leaves nothing behind.

U Cam mass loss

Stellar Science

Century of Amateur Observations Shed Light on Star's Evolution

The amateurs of the AAVSO monitored the star T Ursae Minoris for a century. Now, astronomers think they can explain the star's recent change in behavior.

Artist's concept of Beta Pictoris system

Stellar Science

Beta Pic's New Planet, Jupiter’s Fuzzy Core & An Ancient Star

Astronomers announce another planet around Beta Pictoris, simulations explain Jupiter's large and fuzzy core, and observations reveal an ancient star.


"Invisible" Galaxies Found in the Young Universe

Astronomers have discovered galaxies that have escaped detection until now, uncovering a missing link in galaxy evolution.

Thirty Meter Telescope at night

Professional Telescopes

Maunakea Observatories Shuttered Amid Protests (Update: Observatories Have Reopened)

As protests against the construction of the Thirty Meter Telescope continue, the directors of Maunakea Observatories have taken the unprecedented move of closing all observatories atop the mountain.